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Finding the Fourth Proportional to 13,179.16, 18,187.50 and 7,210.90

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Solution

The fourth proportional to 13,179.16, 18,187.50 and 7,210.90 is: 9,951.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.16 : 18,187.50 = 7,210.90 : x
  2. Step 2: Convert to fraction form
    13,179.16/18,187.50 = 7,210.90/x
  3. Step 3: Cross multiply
    13,179.16x = 18,187.50 × 7,210.90
  4. Step 4: Simplify right side
    13,179.16x = 131,148,243.75
  5. Step 5: Solve for x
    x = 131,148,243.75/13,179.16
  6. Step 6: Final answer
    x = 9,951.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.